Abstract
Based on 27 bonding test of pull-out specimens, the bonding performance between GFRP and concrete was studied systematically. The bond failure between concrete and GFRP includes four stages: microslip stage, linear slip stage, nonlinear slip stage and bond failure stage. The experiment shows that there is no significant correlation between concrete strength and bond strength, bond strength increases with the bond length and decreases with the increase of GFRP reinforcement diameter.
Highlights
Steel bar has an absolute advantage in reinforced concrete, the steel bar in concrete is protected by alkaline concrete, which makes the structure have properties of corrosion resistance and fire resistance
The research on the bond failure and the bond mechanism between FRP bars and concrete is the basis of the research on FRP reinforced concrete structure [4,5,6]
A total of 27 pull-out specimens were designed with the parameters of bond length, concrete strength and GFRP bar diameter
Summary
Steel bar has an absolute advantage in reinforced concrete, the steel bar in concrete is protected by alkaline concrete, which makes the structure have properties of corrosion resistance and fire resistance. FRP reinforcement is a composite material with highperformance fiber as reinforcement and synthetic resin as base material, which is formed after die extrusion and surface treatment. It is a good substitute for reinforcement. The research on the bond failure and the bond mechanism between FRP bars and concrete is the basis of the research on FRP reinforced concrete structure [4,5,6]
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